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Due to global energy and environmental requirements, pre chamber spark ignition natural gas engines have developed rapidly in the past decade. The biogas produced from the controllable thermal cracking of the farming and forestry disposables was used as the fuel of the spark-ignition biogas engine.2. Data on natural gas light hydrocarbon storage and transportation Natural gas is a gaseous fossil fuel mainly composed of methane. It mainly exists in oil fields and natural gas fields, with a small amount also found in coal seams. When non fossil organic matter undergoes anaerobic decay, it produces methane rich gas, which is called biogas. The sources of biogas include swamps between forests and grasslands, landfills, sludge in sewers, and manure, which are produced by anaerobic decomposition of bacteria. Biogas also includes gastrointestinal distension (such as farts), which most commonly comes from livestock such as cows and sheep. When methane escapes into the atmosphere, it will be a greenhouse gas that directly contributes to the worsening of global warming. This scattered methane will be regarded as a pollutant rather than a useful energy source. However, once methane in the atmosphere oxidizes with ozone, it becomes carbon dioxide and water, so the greenhouse effect caused by methane emissions is relatively short-lived. And in terms of combustion, natural gas produces much less carbon dioxide than coal and other Carboniferous fuels. The important biological sources of methane are termites, ruminants (such as cows and sheep), and human cultivation of land. It is estimated that the annual emissions of these three are 1
5, 75, and 100 million tons respectively (the total annual emissions are about 100 million tons).
3. Translation of a foreign article on sewage technology. English to Chinese translation, about 1000 words.
One of production wastewater 1. Treatment method for industrial wastewater 1 of industrial wastewater treatment method is a method for treating industrial wastewater, belonging to the field of wastewater treatment technology. It is to divert the sewage to the collection tank, adjust the pH at the end of the collection tank, use a first stage dissolved air pump to lift it to the first stage pressure dissolved air tank, while inhaling air and coagulation decolorizing agent, and suddenly release the first stage saturated dissolved air water in the first stage pressure dissolved air tank to the first stage air flotation tank to form the first stage treated water; The first stage treated water overflows into the buffer tank, and then the pH is controlled by using a second stage dissolved air pump to lift the first stage treated water into the second stage pressure dissolved air tank. At the same time, air and coagulation decolorizing agent are sucked in, and the second stage saturated dissolved air water in the second stage pressure dissolved air tank is suddenly released into the second stage air flotation tank to form the second stage treated water, which overflows to the sedimentation tank for sedimentation before being discharged; The floating mud in the first and second stage air flotation tanks enters the floating mud tank, is filtered into a filter cake, and the filtrate is returned to the collection tank. The CODcr, decolorization rate, SS, and BOD5 removal rates of industrial wastewater treated by this method are 80-90%, 95%, over 90%, and 75-80%, respectively, which comply with t